A500/A518 Aftermarket Overdrive Ratios

My GVod is a .78 ratio.
For splitting; on paper; it does not play all that well with the automatics.
For the A500;
I have in file, the ratios at 2.74-1.54-1.00-.69. Splitting them it becomes
2.74-2.14-1.54-1.20-1.00-.78-.69-.54
the splits are .78-.72-.78-.83-.78-.88-.78
As you can see the splits are somewhat staggered, and I doubt you would ever shift from 1.20 ratio to 1.00 ratio. and, I doubt you would have much opportunity to use the .88 split. So even tho on paper it maths to 8 ratios, in reality it think it would become a 5 or possibly a 6 speed; depending on your installed rear gear, and intended cruising speed.
Furthermore, the instructions I got from GV said that the GV unit must NOT be back-shifted under power. So you will have to figure out a way to kill the power during the outshift and before engaging the next actual transmission gear. I have a clutch so that was no big deal for me.
In reality, I fear it will soon become;
2.74-1.54-1.00or1.20-.78or.69- and again maybe the .54. thus a 5 speed with options.
and and mostly, it will be a 4 speed; 2.74-1.54-1.00 and one of the three overdrives available, namely; .78, .69 or .54

For the A518
this comes with ratios of 2.45-1.91-1.45-1.13-1.00-.78-.69-.54 with splits of
.78-.76-.78-.88-.78-.88-.78
Here the first 4 ratios are better until you get to shifting from Second-over to direct. So it comes to the same 5spd with options. and you lose the 12% deeper starter gear.